Larry brings up an important point. If the stock pump is in place and not working, it's a big restriction on the inlet of the Pierburg, and the inlet side is not the place to restrict.
Bill Cardell TurboDog's Dad www.flyinmiata.com 1-800-FLY-MX5S (sales) 970-242-3800 (tech) 2008 FM Open House: August 14-17 ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Larry Alster Sent: Thursday, April 03, 2008 9:58 AM To: [EMAIL PROTECTED]; 'Nathan Sumner' Cc: [email protected] Subject: RE: ARG - Fuel Pump dying again. :( I'm not sure you can leave the stock pump in there not running and expect the Pierburg to pull through it. Larry White Knight 1991 Crystal White #99 CSP Silver Bullet 1992 Silverstone #17 SM2 FM I+ Turbo Honey B 1992 Sunburst Yellow #99 SM2L JR Supercharger Whooosh 2004 Titanium Mazdaspeed MX-5 LowCountry Miata http://www.lowcountrymiataclub.net Masters Miata RAGS 074 From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Thursday, April 03, 2008 8:34 AM To: Nathan Sumner Cc: [email protected] Subject: RE: ARG - Fuel Pump dying again. :( I would agree... but I'm clueless why it happens. First pump was stock, started to die 30 minutes out of Grand Junction (wouldn't hold pressure at steady cruise, actually bellied up 3 days later). Wired with 10 or 12 ga from battery to pump by Ken Hill. Second pump, also stock, lasted a year. Rewired with 10ga on a relay at the battery, battery to relay to pump, shortest route possible. Third pump, used Pierburg from FM, lasted maybe year and a half. 10ga to relay, 10 ga to ground. Stock pump still in the tank, unhooked electrically. Good link, thank you. Totally agree, would rather support a real vendor than a nameless eBay guy. Which pump do you have, the 255 or the 255 HP? I have read the HP is louder. Wallyman "Nathan Sumner" <[EMAIL PROTECTED]> "Nathan Sumner" <[EMAIL PROTECTED]> 04/02/2008 08:48 PM To <[EMAIL PROTECTED]>, <[email protected]> cc Subject RE: ARG - Fuel Pump dying again. :( I don't think fuel pumps should go bad that often... Maybe your over doing it and getting too big of a pump and its getting overheated due to the large amount of recirculation require when you aren't at WOT. Just a though and I haven't been following your fuel pump stories. Maybe a RPM/throttle based voltage limiter would help with this issue. I normally don't buy from ebay when I can buy it at the same price from a "real" store. That's just a habit of mine. I know lots of people (including me) that bought walbro 255 from here: http://www.autoperformanceengineering.com/html/fpapps.html <http://www.autoperformanceengineering.com/html/fpapps.html> If the ebay ad picture is of the actual item, its not the "correct" pump as it appears to require you to splice into the miata wiring. The correct one has the miata style connector. Also, I cannot hear my walbro anytime beside when I first turn on the key and even then it isn't loud. Nathan Sumner [EMAIL PROTECTED] ________________________________ From: [EMAIL PROTECTED] [ mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Wednesday, April 02, 2008 8:38 PM To: [email protected] Subject: ARG - Fuel Pump dying again. :( Yup.. pump #3 for the Sub.. this time a used external Pierburg is dying on me... ARG. While my gap was wrong (0.045) which was causing some of my misfire troubles, the real cuplrit is the fuel pump dying off.. it'll go to 60psi at WOT (15psi boost) but then quickly falls on it's face, dropping like a rock and the car starts stumbling, O2 reading leaner than 13.0:1. Since fuel pumps apparently are consumables on my car, any reason I should avoid the $99 Walbro 255lph ones on eBay? I'm not swallowing another $242 for a new Pierburg since the life expectancy of a pump seems to be a year or two.. but at $100 I can almost tolerate the frequency... Thoughts, anyone?? The Pierburg wasn't silent, and you could hear it at idle.. if the Walbro is the same noise level, I think I could tolerate it. http://cgi.ebay.com/ebaymotors/WALBRO-255-LPH-FUEL-PUMP-Mazda-MX5-Miata- MX-5-255lph_W0QQcmdZViewItemQQcategoryZ33555QQihZ002QQitemZ120238884274Q QrdZ1QQsspagenameZWDVW <http://cgi.ebay.com/ebaymotors/WALBRO-255-LPH-FUEL-PUMP-Mazda-MX5-Miata -MX-5-255lph_W0QQcmdZViewItemQQcategoryZ33555QQihZ002QQitemZ120238884274 QQrdZ1QQsspagenameZWDVW> Wallyman This e-mail and any attachments are confidential. If you receive this message in error or are not the intended recipient, you should not retain, distribute, disclose or use any of this information and you should destroy the e-mail and any attachments or copies.
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